Locking device, power assembly, power transmission system, and vehicle

ABSTRACT

A locking device comprising: first and second flanges; and first and second flange locking structures. The first and second flange locking structures are used for selectively locking the first flange and the second flange. Each flange locking structure comprises: a synchronising ring and a driving assembly. The synchronising ring is able to slide relative to the corresponding flange; and the drive assembly is capable of selectively pushing the synchronising ring to slide along the axial direction of the corresponding flange from an unlocked position to a locked position.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is the National Stage of International Application No.PCT/CN2017/117820, “Locking Apparatus, Powertrain, Power TransmissionSystem, and Vehicle,” filed Dec. 21, 2017; which claims priority to andbenefits of Chinese Patent Application Serial No. 2016-11265803.5, filedwith the State Intellectual Property Office of P. R. China on Dec. 30,2016. The entire content of the above-referenced applications areincorporated herein by reference.

FIELD

The present invention relates to the field of vehicle technology, and inparticular to a locking device, a power assembly having the lockingdevice, a power transmission system having the power assembly, and avehicle having the power transmission system.

BACKGROUND

In the related art, when the power transmission system adopts thewheel-side drive form, the power assembly occupies a large space, thevehicle layout is unreasonable, and the mounting and dismounting stepsare complicated. Meanwhile, the power components that drive the twowheels are independent of each other. When the wheel on one side slipsor the wheel-side motor on one side is damaged, the vehicle cannot workor cannot escape, so there is room for improvement.

SUMMARY

An objective of the present invention is to at least resolve one of thetechnical problems in the related art to some extent. To this end, thepresent invention provides a locking device which is simple instructure.

The present invention further provides a power assembly having the abovelocking device.

The present invention further provides a power transmission systemhaving the above power assembly.

The present invention further provides a vehicle having the above powertransmission system.

The locking device according to the present invention includes: a firstflange, the first flange being adapted to be fixed on a first shaft; asecond flange, the second flange being adapted to be fixed on a secondshaft; a first flange locking structure, the first flange lockingstructure being used for selectively locking the first flange and thesecond flange to be adapted to rotate the second flange synchronouslywith the first flange; and a second flange locking structure, the secondflange locking structure being used for selectively locking the secondflange and the first flange to be adapted to rotate the first flangesynchronously with the second flange; wherein the first flange lockingstructure and the second flange locking structure each include: asynchronizing ring, the synchronizing ring being normally connected tothe corresponding flange to be adapted to rotate synchronously with thecorresponding flange, and the synchronizing ring being slidable relativeto the corresponding flange; and a driving component, the drivingcomponent selectively pushing the synchronizing ring to slide from anunlocked position to a locked position in an axial direction of thecorresponding flange, wherein when the synchronizing ring is in thelocked position, the two synchronizing rings are connected to be adaptedto rotate the other flange synchronously with the flange correspondingto the synchronizing ring, and when the synchronizing ring is in theunlocked position, the two synchronizing rings are separated.

The locking device according to embodiments of the present invention canrealize the two-way locking function, and is simple in structure.

The power assembly according to embodiments of the present inventionincludes: a first power component and a second power component, thefirst power component being used for driving a wheel on the left side,the second power component being used for driving a wheel on the rightside, the first power component and the second power component eachincluding a motor and a transmission, and the transmission being adaptedto be connected between the motor and the wheel on the correspondingside; and the locking device according to the embodiments of the firstaspect, the first power component including a first shaft, the secondpower component including a second shaft, the first flange being fixedon the first shaft, the second flange being fixed on the second shaft,and the locking device being used for selectively synchronizing thefirst shaft and the second shaft.

By using the power assembly according to the embodiments of the presentinvention, by providing the locking device to synchronize the firstpower component and the second power component, when the wheel on oneside slips or the motor on one side is damaged or fails, the vehicle canstill operate and has a strong ability to escape.

The power transmission system according to embodiments of the presentinvention includes at least one of the power assemblies described in theabove embodiments, so that when the wheel on one side slips or the motoron one side is damaged or fails, the vehicle can still operate and has astrong ability to escape.

The vehicle according to embodiments of the present invention includesthe above-described power transmission system, so that the vehicle has astrong ability to escape and adapts to various working conditions.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural block diagram of a power transmission systemaccording to embodiments of the present invention;

FIG. 2 is a schematic structural view of the power transmission systemaccording to embodiments of the present invention;

FIG. 3 is a cross-sectional view of a three-stage reducer according toembodiments of the present invention;

FIG. 4 is a schematic structural view of a power assembly according toembodiments of the present invention;

FIG. 5 is an exploded schematic structural view of a housing of thepower assembly according to embodiments of the present invention;

FIG. 6 is a three-dimensional schematic structural view of the powerassembly according to embodiments of the present invention;

FIG. 7 is a cross-sectional view of a first housing according toembodiments of the present invention;

FIG. 8 is a side view of an intermediate housing according to anembodiment of the present invention;

FIG. 9 is a cross-sectional view of the intermediate housing of FIG. 8;

FIG. 10 is a schematic structural view of a second intermediate shaftmatched with the intermediate housing of FIG. 8;

FIG. 11 is a cross-sectional view of the intermediate housing of FIG. 8matched with the second intermediate shaft of FIG. 10;

FIG. 12 is a side view of an intermediate housing according to anembodiment of the present invention;

FIG. 13 is a cross-sectional view of the intermediate housing of FIG.12;

FIG. 14 is a schematic structural view of a second intermediate shaftmatched with the intermediate housing of FIG. 12;

FIG. 15 is a cross-sectional view of the intermediate housing of FIG. 12matched with the second intermediate shaft of FIG. 14;

FIG. 16 is an exploded view of a one-way locking device from a firstviewing angle;

FIG. 17 is an exploded view of the one-way locking device from a secondviewing angle;

FIG. 18 is a cross-sectional view of the one-way locking device whenunlocked;

FIG. 19 is a cross-sectional view of the one-way locking device whenlocked;

FIG. 20 is a schematic structural view of a first flange;

FIG. 21 is a cross-sectional view of the first flange;

FIG. 22 is a schematic structural view of the first flange matched witha synchronizing ring;

FIG. 23 is a cross-sectional view of the first flange matched with thesynchronizing ring when the locking device is unlocked;

FIG. 24 is a cross-sectional view of the first flange matched with thesynchronizing ring when the locking device is locked;

FIG. 25 is an exploded view of a two-way locking device from a firstviewing angle;

FIG. 26 is an exploded view of the two-way locking device from a secondviewing angle;

FIG. 27 is a cross-sectional view when the two-way locking device isunlocked;

FIG. 28 is a cross-sectional view when the two-way locking device islocked in one way; and

FIG. 29 is a cross-sectional view when the two-way locking device islocked in one way.

REFERENCE NUMERALS OF THE ACCOMPANYING DRAWING

Power transmission system 10000, power assembly 1000, first powercomponent 100 a, motor 101, transmission 102, input shaft I, firstintermediate shaft II, second intermediate shaft III, locking deviceconnecting portion C, output shaft IV, primary driving gear 1 a, primarydriven gear 1 b, secondary driving gear 2 a, secondary driven gear 2 b,tertiary driving gear 3 a, tertiary driven gear 3 b, housing 103, firsthousing 1031, motor housing 10311, first sub-transmission housing 10312,input shaft mounting hole P1, first intermediate shaft mounting hole P2,second intermediate shaft mounting hole P3, output shaft mounting holeP4, second housing 1032, intermediate housing 104, surface W1,accommodating cavity 1041, latching structure 1042, first mounting holeR1, second mounting hole R2, third mounting hole R3, fourth mountinghole R4, bearing B1, second power component 100 b, locking device 200,first locking device C1, second locking device C2, one-way lockingdevice 200 a, first flange 201 a, first fixing sleeve 2011 a, firstmounting sleeve 2012 a, first guiding sleeve 2013 a, guiding groove20131 a, internal tooth groove 20132 a, second flange 201 b, secondfixing sleeve 2011 b, second mounting sleeve 2012 b, second guidingsleeve 2013 b, outer tooth groove 20132 b, through hole D, synchronizingring 202, outer ring gear portion 2021, inner ring gear portion 2022,intermediate connecting portion 2023, driving component 203,electromagnet 2031, ejector pin 2032, driving member 2033, drivingprofile S, bushing 204, elastic return member 205, two-way lockingdevice 200 b, first flange 201 a, first fixing sleeve 2011 a, firstmounting sleeve 2012 a, first guiding sleeve 2013 a, first guidinggroove 20131 a, inner tooth groove 20132 a, second flange 201 b, secondfixing sleeve 2011 b, second mounting sleeve 2012 b, second guidingsleeve 2013 b, outer tooth groove 20132 b, first through hole D1,concave portion J, fitting end surface M, first flange locking structureQ1, first synchronizing ring 202 a, first outer ring gear portion 2021a, first inner ring gear portion 2022 a, first intermediate connectingportion 2023 a, first driving component 203 a, first electromagnet 2031a, first ejector pin 2032 a, first driving member 2033 a, first drivingprofile S1, first bushing 204 a, first elastic return member 205 a,first stopping piece 206 a, second flange locking structure Q2, secondsynchronizing ring 202 b, the second outer ring gear portion 2021 b,second inner ring gear portion 2022 b, second intermediate connectingportion 2023 b, second driving component 203 b, second electromagnet2031 b, second ejector pin 2032 b, second driving member 2033 b, seconddriving profile S1, second bushing 204 b, second elastic return member205 b, second stop piece 206 b, second through hole D2, first threadedconnecting piece 207 a, second threaded connecting piece 207 b, flangeassembly 300, left front wheel H1, right front wheel H2, left rear wheelH3, right rear wheel H4, first shaft X1, second shaft X2.

DETAILED DESCRIPTION

The embodiments of the present invention are described in detail below.Examples of the embodiments are illustrated in the accompanyingdrawings. The following embodiments described with reference to theaccompanying drawings are exemplary, and are intended to describe thepresent invention and cannot be construed as a limitation to the presentinvention.

A power transmission system 10000 according to embodiments of thepresent invention will now be described with reference to FIG. 1 to FIG.3. As shown in FIG. 1 to FIG. 3, the power transmission system 10000according to embodiments of the present invention includes at least onepower assembly 1000.

For example, in some embodiments, the power transmission system 10000includes one power assembly 1000, and the power assembly 1000 is usedfor driving front wheels of a vehicle. It can be understood that thefront wheels of the vehicle include a left front wheel H1 and a rightfront wheel H2, and the vehicle is a front-wheel drive vehicle.

In other embodiments, the power transmission system 10000 includes apower assembly 1000, and the power assembly 1000 is used for drivingrear wheels of a vehicle. It will be understood that the rear wheels ofthe vehicle include a left rear wheel H3 and a right rear wheel H4, andthe vehicle is a rear-wheel drive vehicle.

In some embodiments as shown in FIG. 1, the power transmission system10000 includes two power assemblies 1000. One of the power assemblies1000 is used for driving front wheels of a vehicle, and the other powerassembly 1000 is used for driving rear wheels of the vehicle, that is,the vehicle is a four-wheel drive vehicle.

In some embodiments, in the four-wheel drive vehicle, the two powerassemblies 1000 may be disposed in parallel, and the two powerassemblies 1000 are spaced apart in the front-rear direction. Such anarrangement is convenient in assembly and simple in structure.

Further, the two power assemblies 1000 can be symmetrically disposed.The two power assemblies 1000 are spaced apart in the front-reardirection, and the symmetry axis is perpendicular to the front-reardirection. Such an arrangement is convenient for assembly and uniform inload distribution of the vehicle.

In some embodiments, in a four-wheel drive vehicle, two power assemblies1000 are disposed such that one of the power assemblies 1000 is formedby rotating the other power assembly 1000 by 180° about an axisperpendicular to the front-rear direction. Such an arrangement isuniform in load distribution of the vehicle, good in structuralsymmetry, and easy for vehicle arrangement.

As shown in FIG.1 to FIG. 3, the power assembly 1000 includes a firstpower component 100 a and a second power component 100 b. Taking thepower assembly 1000 driving the front wheels of the vehicle as anexample, the first power component 100 a is used for driving the leftfront wheel H1, the second power component 100 b is used for driving theright front wheel H2, the first power component 100 a and the secondpower component 100 b each includes a motor 101 and a transmission 102,and the transmission 102 is adapted to be connected between the motor101 and the wheel on the corresponding side. Thus, each wheel can bedriven separately, that is, each wheel corresponds to a motor 101 and atransmission 102 connected to the motor 101.

As shown in FIG. 2 and FIG. 3, the transmission 102 is a three-stagereducer. The three-stage reducer is used to reduce the speed of themotor 101 and increase the torque. The speed drop is divided into threelevels of gradient. The strength load received by gears in thethree-stage reducer is significantly lowered, so the gear life isensured, and the durability of the entire three-stage reducer isenhanced. Further, as the speed ratio is lowered, the sliding frictionbetween the meshing gears is lowered, so that the heat generated by thesliding friction is reduced, further prolonging the life of the gear.

As shown in FIG. 2 and FIG. 3, the three-stage reducer may include aninput shaft I, a first intermediate shaft II, a second intermediateshaft III and an output shaft IV. The input shaft I is provided with aprimary driving gear 1 a, the input shaft I is connected to the motor101, the first intermediate shaft II is provided with a primary drivengear 1 b and a secondary driving gear 2 a, the second intermediate shaftIII is provided with a secondary driven gear 2 b and a tertiary drivinggear 3 a, the output shaft IV is connected to the wheel on thecorresponding side, and the output shaft IV is provided with a tertiarydriven gear 3 b. The primary driven gear 1 b meshes with the primarydriving gear 1 a, the secondary driven gear 2 b meshes with thesecondary driving gear 2 a, and the tertiary driven gear 3 b meshes withthe tertiary driving gear 3 a, thereby transmitting the power outputfrom the motor 101 sequentially from the input shaft I, the firstintermediate shaft II, the second intermediate shaft III and the outputshaft IV to the wheel, thereby driving the wheel to rotate.

In some embodiments, the primary driving gear 1 a is integrally formedwith the input shaft I, the secondary driving gear 2 a is integrallyformed with the first intermediate shaft II, and the tertiary drivinggear 3 a is integrally formed with the second intermediate shaft III,and thus, the three-stage reducer is simple in structure, low in costand high in structural strength.

In some embodiments, as shown in FIG. 2, the secondary driving gear 2 aand the secondary driven gear 2 b are located on the side close to themotor 101, and the primary driving gear 1 a, the primary driven gear 1b, the tertiary driving gear 3 a and the tertiary driven gear 3 b arelocated on the side away from the motor 101. Such an arrangement savesspace of the vehicle in the left-right direction and saves space in thefront-rear direction. At the same time, in such an arrangement, in theembodiment in which a locking device 200 is disposed between the twotransmissions 102, the locking device 200 is convenient to mount andoccupies less space, and the layout of the vehicle is reasonable.

In some embodiments, the speed ratio of the input shaft I to the outputshaft IV of the three-stage reducer is 16-18. By setting the speed ratiowithin the above range, the motor 101 and the three-stage reducer arebetter matched, and the power output from the motor 101 is fullyutilized.

In some embodiments, the first power component 100 a and the secondpower component 100 b of each power assembly 1000 are symmetricallydisposed in the left-right direction, whereby the structural symmetry isgood, the load distribution of the vehicle is uniform, which isbeneficial to enhancement of the stability of the vehicle.

In short, in the power transmission system 10000 of the aboveembodiments, by setting the transmission 102 as a three-stage reducer,the design difficulty of the entire power transmission system 10000 canbe lowered. The use of the three-stage reducer makes the motor 101slowdown process more stable, which is beneficial to enhancement of thestability of the vehicle. The three-stage reducer has a simple structureand a long service life, and saves maintenance and replacement costs.

A vehicle according to embodiments of the present invention will bebriefly described below. The vehicle includes the above-described powertransmission system 10000, and thus, has a simple structure, a longpractical life and a reasonable spatial layout.

A power transmission system 10000 according to embodiments of thepresent invention will be described below with reference to FIG. 1 toFIG. 15. As shown in FIG. 1 to FIG. 15, the power transmission system10000 includes at least one power assembly 1000, and the power assembly1000 includes a first power component 100 a and a second power component100 b. The power transmission system 10000 can be used for driving frontwheels of the vehicle and/or rear wheels of the vehicle.

The first power component 100 a and the second power component 100 b aresymmetrically disposed in the left-right direction, whereby thestructural symmetry is good, the arrangement is easy, and thearrangement space is saved.

The first power component 100 a is used for driving a wheel on the leftside, and the second power component 100 b is used for driving a wheelon the right side. The first power component 100 a and the second powercomponent 100 b each include a housing 103, and a motor 101 and atransmission 102 disposed in the housing 103, and the transmission 102is adapted to be connected between the motor 101 and the wheel on thecorresponding side.

As shown in FIG. 4 and FIG. 6, the two housings 103 are connected toform an outer casing of the power assembly 1000. By connecting the twohousings 103, the first power component 100 a and the second powercomponent 100 b are connected together, so that the power assembly 1000can be mounted or dismounted as a whole, and the space occupied by thepower assembly 1000 is reduced.

In embodiments having two power assemblies 1000, the outer casings ofthe two power assemblies 1000 may be disposed in parallel. The two outercasings may also be symmetrically disposed in the front-rear direction,and the two power assemblies 1000 may symmetrically disposed in thefront-rear direction with any angle therebetween. Preferably, the twoouter casings may also be in a 180° relationship, that is, the two outercasings are disposed such that one of the outer casings is formed byrotating the other outer casing by about 180° about an axisperpendicular to the front-rear direction.

In short, in the power transmission system 10000 according to someembodiments of the present invention, by connecting the two housings 103of the two power components of the same power assembly 1000, the powerassembly 1000 is compact in structure, occupies less space and isconvenient to mount and dismount.

Some embodiments of the outer casing of the power assembly 1000 arebriefly described below.

In some embodiments, each of the housings 103 may include a firsthousing 1031 and a second housing 1032. One end of the first housing1031 is open, and the second housing 1032 is disposed at the open end ofthe first housing 1031. A mounting space for the motor 101 and thetransmission 102 is defined between the first housing 1031 and thesecond housing 1032. Optionally, the first housing 1031 and the secondhousing 1032 may be detachably connected by a threaded connecting piece,thereby facilitating the mounting of the motor 101 and the transmission102. The two second housings 1032 of the power assembly 1000 areconnected to achieve the connection of the two housings 103.

In some embodiments, as shown in FIG. 5, the two second housings 1032are integrally formed into an intermediate housing 104, so that theouter casing is composed of three parts. Thus, the structure is simple,the development cost is saved, and moreover the space is saved.

In other embodiments, the end surfaces of the two second housings 1032facing each other are in contact with each other, so that each secondhousing 1032 is simple in structure and easy to process, and themounting and dismounting of each power component does not affect theother power component. At the same time, such an arrangement can alsosave space.

In one embodiment as shown in FIG. 5, one of the first housing 1031 andthe second housing 1032 of the same power component includes a motorhousing 10311 and a first sub-transmission housing 10312, the motorhousing 10311 and the first sub-transmission housing 10312 areintegrally formed, and the motor 101 is disposed in the motor housing10311. The other of the first housing 1031 and the second housing 1032of the same power component is a second sub-transmission housing, thefirst sub-transmission housing 10312 and the second sub-transmissionhousing are connected and jointly define an accommodating space, and thetransmission 102 is disposed in the accommodating space.

Further, as shown in FIG. 5, the motor housing 10311 is disposed on anend surface of the first sub-transmission housing 10312 away from thesecond sub-transmission housing. Still further, the motor housing 10311and the first sub-transmission housing 10312 are integrally formed in an“L” shape, and this structure makes the structure of the first housing1031 or the second housing 1032 more compact.

As shown in FIG. 4 and FIG. 5, the two housings 103 are connected toform a “T”-shaped structure, so the structure is compact, and theoccupied space is small. Specifically, the motor housing 10311 islocated outside the corresponding first sub-transmission housing 10312,and the second sub-transmission housing is located inside thecorresponding first sub-transmission housing 10312. That is, in theleft-right direction of the vehicle, two transmissions 102 are disposedin the middle of the two motors 101, and the motor housing 10311 islocated at the front or the rear of the first sub-transmission 102.

Such a “T”-shaped structure arrangement makes the occupied space of theouter casing small, and the outer casing is regular in appearance,convenient for arrangement on the vehicle, and cannot waste space.

As shown in FIG. 6, the motor housing 10311 may be provided with a motorcontroller.

In some embodiments, taking the first housing 1031 including a motorhousing 10311 and a first sub-transmission housing 10312, the secondhousing 1032 being a second sub-transmission housing, the two secondhousings 1032 being integrally formed into an intermediate housing 104and the transmission 102 being a three-stage reducer as an example, thehousing 103 of the three-stage reducer is described in detail.

As shown in FIG. 7, the first sub-transmission housing 10312 is providedwith an input shaft mounting hole P1, a first intermediate shaftmounting hole P2, a second intermediate shaft mounting hole P3 and anoutput shaft mounting hole P4. As shown in FIG. 8, FIG. 9, FIG. 12 andFIG. 13, the intermediate housing 104 is provided with two firstmounting holes R1, two second mounting holes R2, two third mountingholes R3 and two fourth mounting holes R4.

One end of the input shaft I is mounted in the input shaft mounting holeP1, and the other end of the input shaft I is mounted in the firstmounting hole R1. One end of the first intermediate shaft II is mountedin the first intermediate shaft mounting hole P2, and the other end ofthe first intermediate shaft II is installed in the second mounting holeR2. One end of the second intermediate shaft III is mounted in thesecond intermediate shaft mounting hole P3, and the other end of thesecond intermediate shaft III is mounted in the third mounting hole R3.One end of the output shaft IV is mounted in the output shaft mountinghole P4, and the other end of the output shaft IV is mounted in thefourth mounting hole R4.

In one embodiment of a power transmission system 10000 of the presentinvention, no locking device 200 is disposed between the first powercomponent 100 a and the second power component 100 b of the same powerassembly 1000. That is, in this embodiment, the first power component100 a and the second power component 100 b can operate independentlywithout affecting each other.

For the power assembly 1000 in which no locking device 200 is provided,the structure of the housing 103 and the transmission 102 is shown inFIG. 7 to FIG. 10, wherein as shown in FIG. 9, two third mounting holesR3 are in communication, and the inner wall surface W1 of the thirdmounting hole R3 does not require machining treatment. As shown in FIG.10, the other end of the second intermediate shaft III corresponding tothe third mounting hole R3 is supported in the third mounting hole R3through the bearing B1, and the end surface of the other end of thesecond intermediate shaft III is substantially flush with the endsurface of the bearing.

In one embodiment of a power transmission system 10000 of the presentinvention, a locking device 200 is disposed between the first powercomponent 100 a and the second power component 100 b of the same powerassembly 1000. The first power component 100 a and the second powercomponent 100 b of the same power assembly 1000 are connected by thelocking device 200 to be selectively synchronized, that is, when thefirst power component 100 a and the second power component 100 b arelocked, the wheel driven by the first power component 100 a can berotated synchronously with the wheel driven by the second powercomponent 100 b.

In this embodiment, the first power component 100 a and the second powercomponent 100 b can work independently without affecting each other, andthe first power component 100 a and the second power component 100 b canalso work synchronously such that the gears on the left and right sidesrotate synchronously to facilitate the vehicle to escape when the wheelon one side slips.

For the power assembly 1000 in which the locking device 200 is provided,the structure of the housing 103 and the transmission 102 is shown inFIG. 7 to FIG. 10. As shown in FIG. 13, the intermediate housing 104defines an accommodating cavity 1041, the locking device 200 is disposedin the accommodating cavity 1041, the two third mounting holes R3 are incommunication and jointly define the accommodating cavity 1041, and theinner wall surface W1 of the third mounting hole R3 requires machiningtreatment. As shown in FIG. 14, the other end of the second intermediateshaft III corresponding to the third mounting hole R3 is supported inthe third mounting hole R3 through the bearing B1. The other end of thesecond intermediate shaft III passes through the bearing B1 and extendsbeyond the bearing B1, and the excess portion is provided with a lockingdevice connecting portion C. The locking device connecting portion C isused to be connected to the locking device 200. In a specificembodiment, the locking device connecting portion C is used to beconnected to the locking device 200 through a splined structure.

Some embodiments of the power transmission system 10000 according to thepresent invention are briefly described below. In these embodiments, thepower transmission system 10000 includes a locking device 200 and atleast one power assembly 1000.

The power assembly 1000 includes a first power component 100 a and asecond power component 100 b, and the first power component 100 a andthe second power component 100 b are symmetrically disposed in theleft-right direction. The first power component 100 a is used fordriving a wheel on the left side, and the second power component 100 bis used for driving a wheel on the right side. The first power component100 a and the second power component 100 b each include a housing 103,and a motor 101 and a transmission 102 disposed in the housing 103, andthe transmission 102 is adapted to be connected between the motor 101and the wheel on the corresponding side.

As shown in FIG. 12 to FIG. 15, the two housings 103 are connected andthe connecting portion of the two housings 103 defines an accommodatingcavity 1041. The locking device 200 is disposed in the accommodatingcavity 1041, wherein the first power component 100 a and the secondpower component 100 b are connected by the locking device 200 forselective synchronization.

Thereby, the power assembly 1000 thus has two operating states, anunlocked state and a locked state. When the power assembly 1000 is inthe locked state, the first power component 100 a and the second powercomponent 100 b are synchronized by the locking device 200, so that thewheel driven by the first power component 100 a rotates synchronouslywith the wheel driven by the second power component 100 b. When thepower assembly 1000 is in the unlocked state, the first power component100 a and the second power component 100 b are independent of eachother.

When the wheel on one side slips, the locking device 200 synchronizesthe first power component 100 a and the second power component 100 b,thereby outputting the power of the power component corresponding to thewheel which does not slip to the wheel on the slip side through thelocking device 200 to realize power driving, which helps the vehicle toescape.

When the power component on one side is damaged or fails, the lockingdevice 200 synchronizes the first power component 100 a and the secondpower component 100 b, thereby outputting the power of the normallyworking power component to the power component on the other side throughthe locking device 200 so as to drive the wheel on this side and realizepower driving, so the use is more convenient.

According to the power transmission system 10000 of embodiments of thepresent invention, by providing the locking device 200, the maximumpower transmission advantage of the power transmission system 10000 canbe exerted, and the power of the vehicle is enhanced, which isbeneficial to escape at the time of slipping. When the power componenton one side is damaged, the vehicle can still be normally driven.

The power transmission system 10000 has two power assemblies 1000, andthe two power assemblies 1000 respectively drive the front wheels of thevehicle and the rear wheels of the vehicle.

In some embodiments, the quantity of the locking devices 200 may be one,so that the first power component 100 a and the second power component100 b of one of the two power assemblies 1000 are connected by thelocking device 200 for selective synchronization. Thus, in thefront-wheel drive power assembly 1000 and the rear-wheel drive powerassembly 1000, the power assembly 1000 provided with the locking device200 is good in power performance and strong in ability to escape.

In some embodiments, the quantity of the locking devices 200 may be two,so that the first power component 100 a and the second power component100 b of each of the power assemblies 1000 are connected by one lockingdevice 200 for selective synchronization. Thus, the front-wheel drivepower assembly 1000 and the rear-wheel drive power assembly 1000 havegood power performance and strong ability to escape.

In this embodiment, the locking device 200 is disposed between the twotransmissions 102 such that the two transmissions 102 are connected bythe locking device 200 for selective synchronization.

In the embodiment in which the transmission 102 is a three-stagereducer, the two second intermediate shafts III are connected by alocking device 200 for selective synchronization. The locking device 200is arranged between the two second intermediate shafts III. Therotational speeds of the two shafts that need to be synchronized of thelocking device 200 are moderate, the locking device 200 does notinterfere with the gears of the three-stage reducer, and the occupiedspace is small, so the internal layout of the power assembly 1000 ismore reasonable.

As shown in FIG. 13 and FIG. 15, the second sub-transmission housing ofthe first power component 100 a and the second sub-transmission housingof the second power component 100 b are connected and jointly define anaccommodating cavity 1041, and the locking device 200 is disposed in theaccommodating cavity 1041. More specifically, the two secondsub-transmission housings are integrally formed into an intermediatehousing 104, the intermediate housing 104 is provided with two thirdmounting holes R3 in one-to-one correspondence with the secondintermediate shaft III of the three-stage reducer, and the two thirdmounting holes R3 are in communication with each other and jointlydefine the accommodating cavity 1041.

A locking device 200 according to the present invention will now bedescribed with reference to FIG. 16 to FIG. 19 below. The locking device200 shown in FIG. 16 to FIG. 19 is a one-way locking device 200 a. Asshown in FIG. 16 to FIG. 19, the locking device 200 includes a firstflange 201 a, a second flange 201 b, a synchronizing ring 202 and adriving component 203.

The first flange 201 a is adapted to be fixed on the first shaft X1, thesecond flange 201 b is adapted to be fixed on the second shaft X2, andthe synchronizing ring 202 is normally connected to the first flange 201a to be adapted to rotate synchronously with the first flange 201 a,that is, the synchronizing ring 202 is always in a connected state withthe first flange 201 a, and when the first flange 201 a rotates, thesynchronizing ring 202 rotates with the first flange 201 a, thesynchronizing ring 202 is slidable relative to the first flange 201 a,and the synchronizing ring 202 is slidable relative to the first flange201 a in the axial direction of the first flange 201 a.

The driving component 203 selectively pushes the synchronizing ring 202to slide from an unlocked position to a locked position in an axialdirection of the first flange 201 a. When the synchronizing ring 202 isin the locked position, the synchronizing ring 202 is connected to thesecond flange 201 b to be adapted to rotate the second flange 201 bsynchronously with the first flange 201 a. When the synchronizing ring202 is in the unlocked position, the synchronizing ring 202 is separatedfrom the second flange 201 b.

That is, the synchronizing ring 202 moves in the axial direction of thefirst flange 201 a relative to the first flange 201 a under the pushingof the driving component 203. When the synchronizing ring 202 is in thelocked position, the synchronizing ring 202 is connected to the firstflange 201 a, and the synchronizing ring 202 is also connected to thesecond flange 201 b, so that the first flange 201 a drives the secondflange 201 b to rotate synchronously through the synchronizing ring 202to realize power transmission. When the synchronizing ring 202 is in theunlocked position, the synchronizing ring 202 is connected to the firstflange 201 a, and the synchronizing ring 202 is separated from thesecond flange 201 b such that the first flange 201 a and the secondflange 201 b both rotate independently.

The locking device 200 according to embodiments of the present inventioncan realize one-way locking, and thus, has a simple structure, a lessoccupied space, an easy arrangement and a low failure rate. Afterlocking, the locking device can exert the maximum power transmissionadvantage of the transmission system, and enhance the power performanceof the vehicle, which is beneficial to escape when the wheel slips.

In one embodiment of the present invention, the driving component 203includes an electromagnet 2031, an ejector pin 2032 and a driving member2033. The electromagnet 2031 is adapted to be fixed on the housing 103.As shown in FIG. 13, the housing 103 is provided with a latchingstructure 1042. The electromagnet 2031 is connected to the housing 103through the latching structure 1042. Specifically, the electromagnet2031 is latched to the intermediate housing 104.

One end of the ejector pin 2032 is slidably connected to the firstflange 201 a, the first flange 201 a is provided with a through hole D,and the ejector pin 2032 is slidably disposed in the through hole D.

The driving member 2033 is provided with a driving profile S, and theother end of the ejector pin 2032 is matched with the driving profile S.Specifically, the end surface of the other end of the ejector pin 2032always abuts against the driving profile S.

The electromagnet 2031 is selectively energized. When the electromagnet2031 is energized, the driving member 2033 is fixed. Due to the rotationof the first flange 201 a, the driving member 2033 drives the ejectorpin 2032 to move in the axial direction of the first flange 201 athrough the driving profile S and pushes the synchronizing ring 202 toslide from the unlocked position to the locked position.

In some embodiments, the ejector pin 2032 and the driving profile S aremultiple and in one-to-one correspondence, and the multiple ejector pins2032 are spaced apart in the circumferential direction of the firstflange 201 a. In some specific examples of the present invention, thequantities of the ejector pin 2032 and the driving profile S are eachthree.

In some embodiments, the driving profile S is a V-shaped profile, whichis simple in shape and easy to manufacture. As shown in FIG. 16, in theaxial direction of the first flange 201 a, the opening of the V-shapedprofile increases from one end away from the second flange 201 b to oneend near the second flange 201 b.

Further, in the axial direction of the first flange 201 a, a side wallof the V-shaped profile extends along a straight line or an arc from oneend away from the second flange 201 b to one end near the second flange201 b.

The locking device 200 may further include a bushing 204. The bushing204 is sleeved over and fixed on the first flange 201 a, and in theaxial direction of the first flange 201 a, the electromagnet 2031 issandwiched between the bushing 204 and the housing 103. Therefore, thefixing of the electromagnet 2031 is stronger, and the reliability of thelocking device 200 is higher.

The locking device 200 may further include an elastic return member 205,and the elastic return member 205 is connected to the second flange 201b and located between the synchronizing ring 202 and the second flange201 b in the axial direction of the first flange 201 a. During themovement of the synchronizing ring 202 from the unlocked position to thelocked position, the elastic return member 205 is compressed. When theelectromagnet 2031 is de-energized, the elastic return member 205 pushesthe synchronizing ring 202 to slide from the locked position to theunlocked position.

In some embodiments, the elastic return member 205 is a wave spring,whereby the contact area of the elastic return member 205 and the secondflange 201 b is large, and the contact area of the elastic return member205 and the synchronizing ring 202 is large, so the force on thesynchronizing ring 202 is more uniform.

The first flange 201 a includes a fixing sleeve, a mounting sleeve and aguiding sleeve. The fixing sleeve is sleeved over and fixed on the firstshaft X1, and the electromagnet 2031 and the driving member 2033 aresleeved over the fixing sleeve. The mounting sleeve is provided with athrough hole D extending through the mounting sleeve in the axialdirection of the first flange 201 a, and the ejector pin 2032 isslidably disposed in the through hole D. The guiding sleeve is providedwith a guiding groove, and the ejector pin 2032 is slidably disposed inthe guiding groove. The guiding groove and the through hole D can ensurethe movement track of the ejector pin 2032.

In the axial direction of the first flange 201 a, the fixing sleeve, themounting sleeve and the guiding sleeve are sequentially connected andthe distance to the second flange 201 b is decreased.

In the embodiment shown in FIG. 16 to FIG. 19, in the radial directionof the first flange 201 a, the fixing sleeve, the mounting sleeve andthe guiding sleeve are disposed sequentially from the inside to theoutside, that is, in the radial direction of the first flange 201 a, thedistance from the fixing sleeve, the mounting sleeve and the guidingsleeve to the first shaft X1 is sequentially decreased.

As shown in FIG. 16 and FIG. 17, the outer circumferential surface ofthe synchronizing ring 202 is provided with an outer ring gear portion2021, and the inner circumferential surface of the guiding sleeve isprovided with an inner tooth groove 20132 a matched with teeth of theouter ring gear portion 2021. By the matching of the inner tooth groove20132 a and the outer ring gear portion 2021, the synchronizing ring 202is normally connected to the first flange 201 a. The innercircumferential surface of the synchronizing ring 202 is provided withan inner ring gear portion 2022, and the outer circumferential surfaceof the second flange 201 b is provided with an outer tooth groove 20132b adapted to be matched with teeth of the inner ring gear portion 2022.When the synchronizing ring 202 is in the locked position, the outertooth groove 20132 b is matched with the inner ring gear portion 2022,so that the synchronizing ring 202 drives the second flange 201 b torotate synchronously.

Certainly, the implementation form of the one-way locking device 200 ais not limited thereto, and another embodiment of the one-way lockingdevice 200 a is described below. The one-way locking device 200 aincludes a first flange 201 a, a second flange 201 b, a synchronizingring 202 and a driving component 203. For the first flange 201 a and thedriving component 203 in this embodiment, reference may be made to thesecond flange 201 b and the second driving component 203 b in FIG. 25 toFIG. 29. The inner circumferential surface of the synchronizing ring 202is provided with an inner ring gear portion 2022. The outercircumferential surface of the guiding sleeve is provided with an outertooth groove 20132 b matched with teeth of the inner ring gear portion2022. The outer circumferential surface of the synchronizing ring 202 isprovided with an outer ring gear portion 2021. The inner circumferentialsurface of the first flange 201 a is provided with an inner tooth groove20132 a adapted to be matched with teeth of the outer ring gear portion2021. That is, in the one-way locking device 200 a of this embodiment,the synchronizing ring 202 internally meshes with the first flange 201a. In the embodiment of the one-way locking device 200 a shown in FIG.16 to FIG. 19, the synchronizing ring 202 externally meshes with thefirst flange 201 a.

The working process of the one-way locking device 200 a according toembodiments of the present invention will now be described withreference to FIG. 16 to FIG. 19 in conjunction with FIG. 2:

1) When the electromagnet 2031 is not energized

When the left and right wheels do not slip or the motors 101 on bothsides can work normally, the electromagnet 2031 is not energized. Thefirst flange 201 a, the ejector pin 2032, the driving member 2033 andthe synchronizing ring 202 rotate with the first shaft X1, the secondflange 201 b rotates synchronously with the second shaft X2, and theelastic return member 205 pushes the synchronizing ring 202 and thesecond flange 201 b apart.

2) When the electromagnet 2031 is energized

When it is detected that there is a signal that the wheel on one sideslips or the motor on one side fails, the electromagnet 2031 is manuallyor automatically controlled to be energized. The electromagnet 2031generates electromagnetic attraction to fix the driving member 2033, andthe first flange 201 a and the ejector pin 2032 still rotate with thefirst shaft X1, causing the fixed driving member 2033 to push theejector pin 2032 along the driving profile S toward the second flange201 b through the driving profile S, so that the synchronizing ring 202is pushed by the axial force of the ejector pin 2032 to engage with thesecond flange 201 b. Finally, the first shaft X1 and the second shaft X2are locked and rotate synchronously.

3) When the synchronizing ring 202 moves from the locked position to theunlocked position, as long as the electromagnet 2031 is de-energized,the synchronizing ring 202 is pushed back to the initial position by theelastic force of the elastic return member 205.

Thereby, the one-way locking device 200 a is driven by theelectromagnetic force, and thus is simple in control, small in occupiedspace, and large in carrying capacity.

A power assembly 1000 having the above-described one-way locking device200 a will now be described. The power assembly 1000 includes theabove-described locking device 200, a first power component 100 a and asecond power component 100 b. The first power component 100 a is usedfor driving the wheel on the left side, and the second power component100 b is used for driving the wheel on the right side. The first powercomponent 100 a and the second power component 100 b each include amotor 101 and a transmission 102. The transmission 102 is adapted to beconnected between the motor 101 and a wheel on the corresponding side.The first power component 100 a includes a first shaft X1, and thesecond power component 100 b includes a second shaft X2. The firstflange 201 a is fixed on the first shaft X1, and the second flange 201 bis fixed on the second shaft X2. The locking device 200 is used forselectively synchronizing the first shaft X1 and the second shaft X2.

In some embodiments, the transmission 102 is a three-stage reducer. Asshown in FIG. 2 and FIG. 3, the three-stage reducer includes an inputshaft I, a first intermediate shaft II, a second intermediate shaft IIIand an output shaft IV. One of the input shaft I, the first intermediateshaft II, the second intermediate shaft III and the output shaft IV ofthe first power component 100 a is the first shaft X1, and one of theinput shaft I, the first intermediate shaft II, the second intermediateshaft III and the output shaft IV of the second power component 100 b isthe second shaft X2.

It can be understood that, in order to synchronize the first powercomponent 100 a with the second power component 100 b, the first shaftX1 and the second shaft X2 are the input shafts I, the output shafts IV,the first intermediate shafts II or the second intermediate shafts IIIat the same time.

In some embodiments, the locking device 200 is connected between the twosecond intermediate shafts III to selectively synchronize the two secondintermediate shafts III.

A locking device 200 according to the present invention will now bedescribed with reference to FIG. 25 to FIG. 29 below. The locking device200 shown in FIG. 25 to FIG. 29 is a two-way locking device 200 b.

As shown in FIG. 25 to FIG. 29, the locking device 200 includes a firstflange 201 a, a second flange 201 b, a first flange locking structure Q1and a second flange locking structure Q2.

The first flange 201 a is adapted to be fixed on the first shaft X1, andthe second flange 201 b is adapted to be fixed on the second shaft X2.

The first flange locking structure Q1 is used for selectively lockingthe first flange 201 a and the second flange 201 b to be adapted torotate the second flange 201 b synchronously with the first flange 201a.

The second flange locking structure Q2 is used for selectively lockingthe second flange 201 b and the first flange 201 a to be adapted torotate the first flange 201 a synchronously with the second flange 201b.

As shown in FIG. 25 to FIG. 29, the first flange locking structure Q1includes a first synchronizing ring 202 a and a first driving component203 a, and the second flange locking structure Q2 includes a secondsynchronizing ring 202 b and a second driving component 203 b.

The first synchronizing ring 202 a is normally connected to the firstflange 201 a to be adapted to rotate synchronously with the first flange201 a, and the first synchronizing ring 202 a is slidable relative tothe first flange 201 a. The first driving component 203 a selectivelypushes the first synchronizing ring 202 a to slide from the firstunlocked position to the first locked position in the axial direction ofthe first flange 201 a. When the first synchronizing ring 202 a is inthe first locked position, the first synchronizing ring 202 a isconnected to the second synchronizing ring 202 b to be adapted to rotatethe second flange 201 b synchronously with the first flange 201 a, andwhen the first synchronizing ring 202 a is in the unlocked position, thefirst synchronizing ring 202 a is separated from the secondsynchronizing ring 202 b.

The second synchronizing ring 202 b is normally connected to the secondflange 201 b to be adapted to rotate synchronously with the secondflange 201 b, and the second synchronizing ring 202 b is slidablerelative to the second flange 201 b. The second driving component 203 bselectively pushes the second synchronizing ring 202 b to slide from thesecond unlocked position to the second locked position in the axialdirection of the second flange 201 b. When the second synchronizing ring202 b is in the second locked position, the second synchronizing ring202 b is connected to the first synchronizing ring 202 a to be adaptedto rotate the first flange 201 a synchronously with the second flange201 b, and when the second synchronizing ring 202 b is in the unlockedposition, the first synchronizing ring 202 a is separated from thesecond synchronizing ring 202 b.

That is, the first synchronizing ring 202 a moves in the axial directionof the first flange 201 a relative to the first flange 201 a under thepushing of the first driving component 203 a. When the firstsynchronizing ring 202 a is in the first locked position, the firstsynchronizing ring 202 a is connected to the first flange 201 a, and thefirst synchronizing ring 202 a is also connected to the secondsynchronizing ring 202 b, so that the first flange 201 a drives thesecond flange 201 b to rotate synchronously by the matching of the firstsynchronizing ring 202 a and the second synchronizing ring 202 b torealize power transmission. When the first synchronizing ring 202 a isin the unlocked position, the first synchronizing ring 202 a isconnected to the first flange 201 a, and the first synchronizing ring202 a is separated from the second synchronizing ring 202 b such thatthe first flange 201 a and the second flange 201 b both rotateindependently.

The second synchronizing ring 202 b moves in the axial direction of thesecond flange 201 b relative to the second flange 201 b under thepushing of the second driving component 203 b. When the secondsynchronizing ring 202 b is in the second locked position, the secondsynchronizing ring 202 b is connected to the second flange 201 b, andthe second synchronizing ring 202 b is also connected to the firstsynchronizing ring 202 a, so that the second flange 201 b drives thefirst flange 201 a to rotate synchronously by the matching of the firstsynchronizing ring 202 a and the second synchronizing ring 202 b torealize power transmission. When the second synchronizing ring 202 b isin the unlocked position, the second synchronizing ring 202 b isconnected to the second flange 201 b, and the second synchronizing ring202 b is separated from the first synchronizing ring 202 a, so that thefirst flange 201 a and the second flange 201 b both rotateindependently.

The locking device 200 according to embodiments of the present inventioncan realize two-way locking, thereby realizing the transmission of powerfrom the first flange 201 a to the second flange 201 b or thetransmission of power from the second flange 201 b to the first flange201 a, and thus, is simple in control, less in occupied space, easy forarrangement and large in carrying capacity. After locking, the lockingdevice can exert the maximum power transmission advantage of thetransmission system, and enhance the power performance of the vehicle,which is beneficial to escape when the wheel slips.

As shown in FIG. 25 to FIG. 29, the first driving component 203 aincludes a first electromagnet 2031 a, a first ejector pin 2032 a and afirst driving member 2033 a. The first electromagnet 2031 a is adaptedto be fixed to the housing 103, and one end of the first ejector pin2032 a is slidably connected to the first flange 201 a. The firstdriving member 2033 a is provided with a first driving profile S1, andthe other end of the first ejector pin 2032 a is matched with the firstdriving profile S1. The first electromagnet 2031 a is selectivelyenergized. When the first electromagnet 2031 a is energized, the firstdriving member 2033 a is fixed, and the first flange 201 a rotates, sothat the first driving member 2033 a drives the first ejector pin 2032 ato move in the axial direction of the first flange 201 a through thefirst driving profile S1, and the first ejector pin 2032 a pushes thefirst synchronizing ring 202 a to move from a position where the firstsynchronizing ring 202 a is separated from the second synchronizing ring202 b to a position where the first synchronizing ring 202 a isconnected to the second synchronizing ring 202 b.

As shown in FIG. 25 to FIG. 29, the second driving component 203 bincludes a second electromagnet 2031 b, a second ejector pin 2032 b anda second driving member 2033 b. The second electromagnet 2031 b isadapted to be fixed to the housing 103, and one end of the secondejector pin 2032 b is slidably connected to the second flange 201 b. Thesecond driving member 2033 b is provided with a second driving profileS1, and the other end of the second ejector pin 2032 b is matched withthe second driving profile S1. The second electromagnet 2031 b isselectively energized. When the second electromagnet 2031 b isenergized, the second driving member 2033 b is fixed, and the secondflange 201 b rotates, so that the second driving member 2033 b drivesthe second ejector pin 2032 b to move in the axial direction of thesecond flange 201 b through the second driving profile S1, and thesecond ejector pin 2032 b pushes the second synchronizing ring 202 b tomove from a position where the first synchronizing ring 202 a isseparated from the second synchronizing ring 202 b to a position wherethe first synchronizing ring 202 a is connected to the secondsynchronizing ring 202 b.

As shown in FIG. 25 to FIG. 29, the first ejector pin 2032 a and thefirst driving profile S1 are both multiple and in one-to-onecorrespondence, and the first ejector pins 2032 a are spaced apart in acircumferential direction of the first flange 201 a. The second ejectorpin 2032 b and the second driving profile S1 are both multiple and inone-to-one correspondence, and the second ejector pins 2032 b are spacedapart in a circumferential direction of the second flange 201 b.

The first driving profile S1 is a V-shaped profile, and in the axialdirection of the first flange 201 a, the opening of the V-shaped profileof the first driving member 2033 a increases from one end away from thesecond flange 201 b to one end near the second flange 201 b. In theaxial direction of the first flange 201 a, a side wall of the V-shapedprofile of the first driving member 2033 a extends along a straight lineor an arc from one end away from the second flange 201 b to one end nearthe second flange 201 b.

The second driving profile S1 is a V-shaped profile, and in the axialdirection of the second flange 201 b, the opening of the V-shapedprofile of the second driving member 2033 b increases from one end awayfrom the first flange 201 a to one end near the first flange 201 a. Inthe axial direction of the second flange 201 b, a side wall of theV-shaped profile of the second driving member 2033 b extends along astraight line or an arc from one end away from the first flange 201 a toone end near the first flange 201 a.

Further, the first flange locking structure Q1 further includes a firstbushing 204 a, the first bushing 204 a is sleeved over and fixed on thefirst flange 201 a, and in the axial direction of the first flange 201a, the first electromagnet 2031 a is sandwiched between the firstbushing 204 a and the corresponding housing 103.

The second flange locking structure Q2 further includes a second bushing204 b, the second bushing 204 b is sleeved over and fixed on the secondflange 201 b, and in the axial direction of the second flange 201 b, thesecond electromagnet 2031 b is sandwiched between the second bushing 204b and the corresponding housing 103.

The first flange locking structure Q1 further includes a first stoppiece 206 a and a first elastic return member 205 a. The first elasticreturn member 205 a is connected to the first stop piece 206 a, and thefirst stop piece 206 a is connected to the first flange 201 a. In theaxial direction of the first flange 201 a, the first elastic returnmember 205 a is located between the first synchronizing ring 202 a andthe first stop piece 206 a. During the movement of the firstsynchronizing ring 202 a from the first unlocked position to the firstlocked position, the first elastic return member is compressed.

Optionally, the first stop piece 206 a is connected to the first flange201 a by a first threaded connecting piece 207 a.

The second flange locking structure Q2 further includes a second stoppiece 206 b and a second elastic return member 205 b. The second elasticreturn member 205 b is connected to the second stop piece 206 b, and thesecond stop piece 206 b is connected to the second flange 201 b. In theaxial direction of the second flange 201 b, the second elastic returnmember 205 b is located between the second synchronizing ring 202 b andthe second stop piece 206 b. During the movement of the secondsynchronizing ring 202 b from the second unlocked position to the secondlocked position, the second elastic return member is compressed.

In some embodiments, the second stop piece 206 b is connected to thesecond flange 201 b by a second threaded connecting piece 207 b.

In some embodiments, the first elastic return member 205 a and thesecond elastic return member 205 b may both be wave springs.

In some embodiments of the present invention, as shown in FIG. 25 toFIG. 29, the first flange 201 a includes a first fixing sleeve 2011 a, afirst mounting sleeve 2012 a and a first guiding sleeve 2013 a. Thefirst fixing sleeve 2011 a is sleeved over and fixed on the first shaftX1, and both the first electromagnet 2031 a and the first driving member2033 a are sleeved over the first fixing sleeve 2011 a. The firstmounting sleeve 2012 a is provided with a first through hole D1extending through the first mounting sleeve 2012 a in the axialdirection of the first flange 201 a, and the first ejector pin 2032 a isslidably disposed in the first through hole D1. The first guiding sleeve2013 a is provided with a first guiding groove 20131 a, and the firstejector pin 2032 a is slidably disposed in the first guiding groove20131 a.

In the axial direction of the first flange 201 a, the first fixingsleeve 2011 a, the first mounting sleeve 2012 a and the first guidingsleeve 2013 a are sequentially connected and the distance to the secondflange 201 b is decreased.

In some embodiments of the present invention, as shown in FIG. 25 toFIG. 29, the second flange 201 b includes a second fixing sleeve 2011 b,a second mounting sleeve 2012 b and a second guiding sleeve 2013 b. Thesecond fixing sleeve 2011 b is sleeved over and fixed on the secondshaft X2, and both the second electromagnet 2031 b and the seconddriving member 2033 b are sleeved over the second fixing sleeve 2011 b.The second mounting sleeve 2012 b is provided with a second through holeD2 extending through the second mounting sleeve 2012 b in the axialdirection of the second flange 201 b, and the second ejector pin 2032 bis slidably disposed in the second through hole D2. The second guidingsleeve 2013 b is provided with a second guiding groove, and the secondejector pin 2032 b is slidably disposed in the second guiding groove.

In the axial direction of the second flange 201 b, the second fixingsleeve 2011 b, the second mounting sleeve 2012 b and the second guidingsleeve 2013 b are sequentially connected and the distance to the firstflange 201 a is decreased.

In one embodiment as shown in FIG. 25 to FIG. 29, the first guidinggroove 20131 a of the first flange 201 a is disposed on the innercircumferential surface of the first guiding sleeve 2013 a, and thesecond guiding groove of the second flange 201 b is disposed on theouter circumferential surface of the second guiding sleeve 2013 b.

Further, the outer circumferential surface of the first synchronizingring 202 a is provided with a first outer ring gear portion 2021 a, andthe inner circumferential surface of the first guiding sleeve 2013 a isprovided with an inner tooth groove 20132 a matched with teeth of thefirst outer ring gear portion 2021 a. The inner circumferential surfaceof the second synchronizing ring 202 b is provided with a second innerring gear portion 2022 b, and the outer circumferential surface of thesecond guiding sleeve 2013 b is provided with an outer tooth groove20132 b matched with teeth of the second inner ring gear portion 2022 b.The inner circumferential surface of the first synchronizing ring 202 ais provided with a first inner ring gear portion 2022 a, and the outercircumferential surface of the second synchronizing ring 202 b isprovided with a tooth groove adapted to be matched with teeth of thefirst inner ring gear portion 2022 a. A first intermediate connectingportion 2023 a is connected between the first outer ring gear portion2021 a and the first inner ring gear portion 2022 a. A secondintermediate connecting portion 2023 b is connected between the secondouter ring gear portion 2021 b and the second inner ring gear portion2022 b, and the second outer ring gear portion 2021 b is adapted to bematched with the first inner ring gear portion 2022 a.

As shown in FIG. 25 to FIG. 29, in the radial direction, the firstguiding sleeve 2013 a, the first synchronizing ring 202 a, the secondsynchronizing ring 202 b and the second guiding sleeve 2013 b aredisposed sequentially from the outside to the inside.

As can be seen from the above description, as shown in FIG. 25 to FIG.29, the locking device 200 includes a first flange 201 a, a secondflange 201 b, a first flange locking structure Q1 and a second flangelocking structure Q2. The first flange locking structure Q1 is used forselectively locking the first flange 201 a and the second flange 201 bto be adapted to rotate the second flange 201 b synchronously with thefirst flange 201 a. The second flange locking structure Q2 is used forselectively locking the second flange 201 b and the first flange 201 ato be adapted to rotate the first flange 201 a synchronously with thesecond flange 201 b.

The first flange locking structure Q1 and the second flange lockingstructure Q2 each include a synchronizing ring 202 and a drivingcomponent 203. The synchronizing ring 202 is normally connected to thecorresponding flange to be adapted to rotate synchronously with thecorresponding flange, and the synchronizing ring 202 is slidablerelative to the corresponding flange. The driving component 203selectively pushes the synchronizing ring 202 to slide from the unlockedposition to the locked position in the axial direction of thecorresponding flange. When the synchronizing ring 202 is in the lockedposition, the two synchronizing rings 202 are connected to be adapted torotate the other flange synchronously with the flange corresponding tothe synchronizing ring 202. When the synchronizing ring 202 is in theunlocked position, the two synchronizing rings 202 are separated.

Each of the driving components 203 includes an electromagnet 2031, anejector pin 2032 and a driving member 2033. The electromagnet 2031 isadapted to be fixed on the housing 103. One end of the ejector pin 2032is slidably connected to the corresponding flange, and the drivingmember 2033 is provided with a driving profile S. The other end of theejector pin 2032 is matched with the driving profile S, and theelectromagnet 2031 is selectively energized. When the electromagnet 2031is energized, the driving member 2033 is fixed to drive the ejector pin2032 to move in the axial direction of the corresponding flange throughthe driving profile S and push the corresponding synchronizing ring 202to move from a position where the two synchronizing rings 202 areseparated to a position where the two synchronizing rings 202 areconnected.

In some embodiments, the ejector pin 2032 and the driving profile S aremultiple and in one-to-one correspondence, and the ejector pins 2032 arespaced apart in the circumferential direction of the correspondingflange.

In some embodiments, the driving profile S is a V-shaped profile, and inthe axial direction of the corresponding flange, the opening of theV-shaped profile increases from one end away from the other flange toone end near the other flange.

In some embodiments, in the axial direction of the corresponding flange,a side wall of the V-shaped profile extends along a straight line or anarc from one end away from the other flange to one end near the otherflange.

In some embodiments, the first flange locking structure Q1 and thesecond flange locking structure Q2 each further include a bushing 204.The bushing 204 is sleeved over and fixed on the corresponding flange,and in the axial direction of the corresponding flange, theelectromagnet 2031 is sandwiched between the bushing 204 and thecorresponding housing 103.

In some embodiments, the first flange locking structure Q1 and thesecond flange locking structure Q2 each further include: a stop pieceand an elastic return member 205. The elastic return member 205 isconnected to the stop piece, and the stop piece is connected to thecorresponding flange. In the axial direction of the correspondingflange, the elastic return member 205 is located between thecorresponding synchronizing ring 202 and the stop piece. During themovement of the corresponding synchronizing ring 202 from the unlockedposition to the locked position, the elastic return member iscompressed.

In some embodiments, the elastic return member 205 is a wave spring.

In some embodiments, the first flange 201 a and the second flange 201 bmay each include a fixing sleeve, a mounting sleeve and a guidingsleeve. The fixing sleeve is sleeved over and fixed on the correspondingshaft, and both the electromagnet 2031 and the driving member 2033 aresleeved over the fixing sleeve. The mounting sleeve is provided with athrough hole D extending through the mounting sleeve in the axialdirection of the corresponding flange, and the ejector pin 2032 isslidably disposed in the through hole D. The guiding sleeve is providedwith a guiding groove, and the ejector pin 2032 is slidably disposed inthe guiding groove.

In the axial direction of the corresponding flange, the fixing sleeve,the mounting sleeve and the guiding sleeve are sequentially connectedand the distance to the other flange is decreased. The guiding groove ofthe first flange 201 a is disposed on an inner circumferential surfaceof the guiding sleeve, and the guiding groove of the second flange 201 bis disposed on an outer circumferential surface of the guiding sleeve.

An outer circumferential surface of the synchronizing ring 202 of thefirst flange locking structure Q1 is provided with an outer ring gearportion 2021, and the inner circumferential surface of the guidingsleeve of the first flange locking structure Q1 is provided with aninner tooth groove 20132 a matched with teeth of the outer ring gearportion 2021. An inner circumferential surface of the synchronizing ring202 of the second flange locking structure Q2 is provided with an innerring gear portion 2022, and the outer circumferential surface of theguiding sleeve of the second flange locking structure Q2 is providedwith an outer tooth groove 20132 b matched with teeth of the inner ringgear portion 2022.

The working process of the two-way locking device 200 a according toembodiments of the present invention will now be described withreference to FIG. 25 to FIG. 29 in conjunction with FIG. 2:

1) When both the first electromagnet 2031 a and the second electromagnet2031 b are not energized

When the left and right wheels do not slip or both motors 101 can worknormally, neither the first electromagnet 2031 a nor the secondelectromagnet 2031 b is energized. The first flange 201 a, the firstejector pin 2032 a, the first driving member 2033 a and the firstsynchronizing ring 202 a rotate with the first shaft X1, and the secondflange 201 b, the second ejector pin 2032 b, the second driving member2033 b and the second synchronizing ring 202 b rotate synchronously withthe second shaft X2. The first elastic return member 205 a pushes thefirst synchronizing ring 202 a and the second synchronizing ring 202 bapart, and the second elastic return member 205 b pushes the firstsynchronizing ring 202 a and the second synchronizing ring 202 b apart.

2) When the first electromagnet 2031 a is energized

When it is detected that there is a signal indicating that the wheel onthe right side slips or the motor on the right side fails, the firstelectromagnet 2031 a is manually or automatically controlled to beenergized. The first electromagnet 2031 a generates electromagneticattraction to fix the first driving member 2033 a, and the first flange201 a and the first ejector pin 2032 a still rotate with the first shaftX1, causing the fixed first driving member 2033 a to push the firstejector pin 2032 a along the first driving profile S1 toward the secondsynchronizing ring 202 b through the first driving profile S1, so thatthe first synchronizing ring 202 a is pushed by the axial force of thefirst ejector pin 2032 a to engage with the second synchronizing ring202 b. Finally, the first shaft X1 and the second shaft X2 are lockedand rotate synchronously.

4) When the first synchronizing ring 202 a moves from the first lockedposition to the first unlocked position, as long as the firstelectromagnet 2031 a is de-energized, the first synchronizing ring 202 ais pushed back to the initial position by the elastic force of the firstelastic return member 205 a.

5) When it is detected that there is a signal indicating that the wheelon the left side slips or the motor on the left side fails, the secondelectromagnet 2031 b is manually or automatically controlled to beenergized. The second electromagnet 2031 b generates electromagneticattraction to fix the second driving member 2033 b, and the secondflange 201 b and the second ejector pin 2032 b still rotate with thesecond axis X2, causing the fixed second driving member 2033 b to pushthe second ejector pin 2032 b toward the first synchronizing ring 202 aalong the second driving profile Si through the second driving profileS1, so that the second synchronizing ring 202 b is pushed by the axialforce of the second ejector pin 2032 b to engage with the firstsynchronizing ring 202 a. Finally, the first shaft X1 and the secondshaft X2 are locked and rotate synchronously.

6) When the second synchronizing ring 202 b moves from the second lockedposition to the second unlocked position, as long as the secondelectromagnet 2031 b is de-energized, the second synchronizing ring 202b is pushed back to the initial position by the elastic force of thesecond elastic return member 205 b.

Thereby, the two-way locking device 200 b is driven by theelectromagnetic force, and thus is simple in control, small in occupiedspace, and large in carrying capacity.

A power assembly 1000 having the above-described two-way locking device200 b will now be described. The power assembly 1000 includes theabove-described locking device 200, a first power component 100 a and asecond power component 100 b. The first power component 100 a is usedfor driving the wheel on the left side, and the second power component100 b is used for driving the wheel on the right side. The first powercomponent 100 a and the second power component 100 b each include amotor 101 and a transmission 102. The transmission 102 is adapted to beconnected between the motor 101 and a wheel on the corresponding side.The first power component 100 a includes a first shaft X1, and thesecond power component 100 b includes a second shaft X2. The firstflange 201 a is fixed on the first shaft X1, and the second flange 201 bis fixed on the second shaft X2. The locking device 200 is used forselectively synchronizing the first shaft X1 and the second shaft X2.

In some embodiments, the transmission 102 is a three-stage reducer. Asshown in FIG. 2 and FIG. 3, the three-stage reducer includes an inputshaft I, a first intermediate shaft II, a second intermediate shaft IIIand an output shaft IV. One of the input shaft I, the first intermediateshaft II, the second intermediate shaft III and the output shaft IV ofthe first power component 100 a is the first shaft X1, and one of theinput shaft I, the first intermediate shaft II, the second intermediateshaft III and the output shaft IV of the second power component 100 b isthe second shaft X2.

It can be understood that, in order to synchronize the first powercomponent 100 a with the second power component 100 b, the first shaftX1 and the second shaft X2 are the input shafts I, the output shafts IV,the first intermediate shafts II or the second intermediate shafts IIIat the same time.

In some embodiments, the locking device 200 is connected between the twosecond intermediate shafts III to selectively synchronize the two secondintermediate shafts III.

A flange assembly 300 according to the present invention will now bedescribed in detail with reference to FIG. 20 to FIG. 24 in conjunctionwith FIG. 16 to FIG. 19 and FIG. 25 to FIG. 29.

The flange assembly 300 according to embodiments of the presentinvention includes a flange, a synchronizing ring 202 and a drivingcomponent 203. The synchronizing ring 202 is normally connected to theflange to be adapted to rotate synchronously with the flange, and thesynchronizing ring 202 is slidable relative to the flange. The drivingcomponent 203 selectively drives the synchronizing ring 202 to disengagefrom the unlocked position in the axial direction of the flange.

When the synchronizing ring 202 is in the unlocked position, thesynchronizing ring 202 is fit with a fitting end surface M of theflange, and the fitting end surface M is provided with a concave portionJ recessed away from the synchronizing ring 202. Therefore, the contactarea between the fitting end surface M of the flange and thesynchronizing ring 202 is small, and thus, when the synchronizing ring202 disengages from the unlocked position, the resistance is small andthe disengagement is easier.

In some embodiments, the flange assembly 300 is disposed in a case body,and the flange assembly 300 is immersed in lubricating oil. Therefore,when the synchronizing ring 202 is in the unlocked position, thesynchronizing ring 202 is fit with the fitting end surface M of theflange, and is not easily separated. According to the present invention,by disposing the concave portion J on the fitting end surface M, thecontact area is reduced, so that the synchronizing ring 202 and theflange are more easily separated.

In some embodiments, the concave portion J includes an annular groovedisposed on the fitting end surface M, and the annular groove extends byone full turn in the circumferential direction of the flange.

In some embodiments, the concave portion J may include multiple pitsdisposed on the fitting end surface M, and the multiple pits are spacedapart in the circumferential direction of the flange.

In some embodiments, the concave portion J may include multiple viaholes disposed on the fitting end surface M and extending through thefirst flange 201 a in the axial direction of the flange, and themultiple via holes are spaced apart in the circumferential direction ofthe flange. The arrangement of the via holes not only makes thesynchronizing ring 202 easier to disengage from the flange, but alsoreduces the weight of the flange.

It can be understood that the flange here may be the first flange 201 aor the second flange 201 b.

Further, in the embodiment in which the flange is sleeved over thesynchronizing ring 202, the synchronizing ring 202 includes an outerring gear portion 2021, an intermediate connecting portion 2023 and aninner ring gear portion 2022 which are sequentially connected from theoutside to the inside in the radial direction of the synchronizing ring202. The flange is provided with an internal tooth groove 20132 amatched with teeth of the outer ring gear portion 2021. In the axialdirection of the flange, the concave portion J is disposed opposite toat least a portion of the inner ring gear portion 2022, and the ejectorpin 2032 is disposed opposite to the intermediate connecting portion2023, whereby the thrust of the ejector pin 2032 is more easilytransmitted to the synchronizing ring 202.

Further, in the embodiment in which the synchronizing ring 202 issleeved over the flange, the synchronizing ring 202 includes an outerring gear portion 2021, an intermediate connecting portion 2023 and aninner ring gear portion 2022 which are sequentially connected from theoutside to the inside in the radial direction of the synchronizing ring202. The flange is provided with an outer tooth groove 20132 b matchedwith teeth of the inner ring gear portion 2022, and the concave portionJ is disposed opposite to at least a portion of the outer ring gearportion 2021 in the axial direction of the flange.

Yet another locking device 200 according to embodiments of the presentinvention will be briefly described below. The locking device 200 is aone-way locking device 200 a, including the flange assembly 300 and thesecond flange 201 b in the above embodiment, the flange is a firstflange 201 a, the first flange 201 a is adapted to be fixed on the firstshaft X1, and the second flange 201 b is adapted to be fixed on thesecond shaft X2. The driving component 203 selectively pushes thesynchronizing ring 202 to slide from an unlocked position to a lockedposition in an axial direction of the first flange 201 a. When thesynchronizing ring 202 is in the locked position, the synchronizing ring202 is connected to the second flange 201 b to be adapted to rotate thesecond flange 201 b synchronously with the first flange 201 a. When thesynchronizing ring 202 is in the unlocked position, the synchronizingring 202 is separated from the second flange 201 b.

The difference between this embodiment and the embodiment shown in FIG.16 to FIG. 19 is that the structure of the flange provided with theejector pin 2032 is different, that is, in the embodiment, the fittingend surface M of the flange (first flange 201 a) provided with theejector pin 2032 and the synchronizing ring 202 is provided with aconcave portion J recessed in a direction away from the synchronizingring 202, whereby the disengagement of the synchronizing ring 202 fromthe flange is easier. Specifically, when the electromagnet 2031 isde-energized, the synchronizing ring 202 is more easily separated fromthe first flange 201 a.

That is, the flange assembly 300 described above can be used in theone-way locking device 200 a.

A locking device 200 according to embodiments of the present inventionwill be briefly described below. The locking device 200 includes twoflange assemblies 300. One of the flange assemblies 300 includes a firstflange 201 a, a first synchronizing ring 202 a and a first drivingcomponent 203 a. The other flange assembly 300 includes a second flange201 b, a second synchronizing ring 202 b and a second driving component203 b.

The first flange 201 a is adapted to be fixed on the first shaft X1, andthe second flange 201 b is adapted to be fixed on the second shaft X2.The first synchronizing ring 202 a is normally connected to the firstflange 201 a to be adapted to rotate synchronously with the first flange201 a, and the first synchronizing ring 202 a is slidable relative tothe first flange 201 a. The first driving component 203 a selectivelypushes the first synchronizing ring 202 a to slide from the firstunlocked position to the first locked position in the axial direction ofthe first flange 201 a. When the first synchronizing ring 202 a is inthe first locked position, the first synchronizing ring 202 a isconnected to the second synchronizing ring 202 b to be adapted to rotatethe second flange 201 b synchronously with the first flange 201 a, andwhen the first synchronizing ring 202 a is in the unlocked position, thefirst synchronizing ring 202 a is separated from the secondsynchronizing ring 202 b.

The second synchronizing ring 202 b is normally connected to the secondflange 201 b to be adapted to rotate synchronously with the secondflange 201 b, and the second synchronizing ring 202 b is slidablerelative to the second flange 201 b. The second driving component 203 bselectively pushes the second synchronizing ring 202 b to slide from thesecond unlocked position to the second locked position in the axialdirection of the second flange 201 b. When the second synchronizing ring202 b is in the second locked position, the second synchronizing ring202 b is connected to the first synchronizing ring 202 a to be adaptedto rotate the first flange 201 a synchronously with the second flange201 b, and when the second synchronizing ring 202 b is in the unlockedposition, the first synchronizing ring 202 a is separated from thesecond synchronizing ring 202 b.

That is, the flange assembly 300 may be applied to the two-way lockingdevice 200 b such that the first flange 201 a and the second flange 201b may each be provided with a concave portion J, so that the firstsynchronizing ring 202 a is more easily separated from the first flange201 a and the second flange 201 b is more easily separated from thesecond synchronizing ring 202 b. Specifically, when the firstelectromagnet 2031 a is de-energized, the first synchronizing ring 202 ais more easily separated from the first flange 201 a. Alternatively,when the second electromagnet 2031 b is de-energized, the secondsynchronizing ring 202 b is more easily separated from the second flange201 b.

A power transmission system 10000 according to embodiments of thepresent invention is described below. The power transmission system10000 includes at least one power assembly 1000 and a locking device200.

The power assembly 1000 includes a first power component 100 a and asecond power component 100 b. The first power component 100 a is usedfor driving a wheel on the left side, and the second power component 100b is used for driving a wheel on the right side. The first powercomponent 100 a and the second power component 100 b each include amotor 101 and a transmission 102, and the transmission 102 is adapted tobe connected between the motor 101 and a wheel on the correspondingside.

The first power component 100 a and the second power component 100 b areconnected by the locking device 200 for selective synchronization. Whenone of the wheel on the right side and the wheel on the left side slipsor one of the two motors 101 is damaged or fails, the locking device 200synchronizes the first power component 100 a and the second powercomponent 100 b.

That is, the locking device 200 is used for locking the first powercomponent 100 a and the second power component 100 b when the wheel onone side slips or one of the two motors 101 is damaged or fails suchthat the first power component 100 a and the second power component 100b are synchronized, so that the wheels on both sides rotatesynchronously, and the vehicle has a strong ability to escape. When onemotor 101 fails, the driving of the vehicle can still be realized.

In the power transmission system 10000 of this embodiment, the firstpower component 100 a, the second power component 100 b and the housing103 may each employ the first power component 100 a, the second powercomponent 100 b and the housing 103 described in the above embodiments.Certainly, the housing 103 corresponds to the housing 103 provided withthe locking device 200.

The locking device 200 may be the one-way locking device 200 a shown inFIG. 16 to FIG. 19, the locking device 200 may also be the two-waylocking device 200 b shown in FIG. 25 to FIG. 29, and the locking device200 may also be the locking device 200 having the recessed portion Jshown in FIG. 20 to FIG. 24.

In some embodiments, the first power component 100 a and the secondpower component 100 b each include a housing 103, and a motor 101 and atransmission 102 that are disposed in the housing 103. The two housings103 are connected and the connecting portion of the two housings 103defines an accommodating cavity 1041, and the locking device 200 isdisposed in the accommodating cavity 1041. The two transmissions 102 areconnected by the locking device 200 for selective synchronization. Thetransmission 102 is a three-stage reducer. The two second intermediateshafts III are connected by the locking device 200. When one of the twomotors 101 is damaged or fails or the wheel on one side slips, the twosecond intermediate shafts III rotate synchronously.

The locking device 200 includes two flanges, and the two flanges arefixed in one-to-one correspondence with the two shafts for selectivelylocking the two flanges to be adapted to at least one flange lockingstructure for rotating the two flanges synchronously.

The flange locking structure includes a synchronizing ring 202 and adriving component 203. The synchronizing ring 202 is normally connectedto the corresponding flange to be adapted to rotate synchronously withthe corresponding flange, and the synchronizing ring 202 is slidablerelative to the corresponding flange. The driving component 203selectively pushes the synchronizing ring 202 to slide from an unlockedposition to a locked position in an axial direction of the correspondingflange. When the synchronizing ring 202 is in the locked position, thetwo flanges rotate synchronously, and when the synchronizing ring 202 isin the unlocked position, the two flanges are independent of each other.

Further, the synchronizing ring 202 is fit with the fitting end surfaceM of the corresponding flange, and the fitting end surface M is providedwith a concave portion J recessed away from the synchronizing ring 202.

The flange includes a fixing sleeve, a mounting sleeve and a guidingsleeve. The fixing sleeve is adapted to be sleeved over and fixed on ashaft, and both the electromagnet 2031 and the driving member 2033 aresleeved over the fixing sleeve. The mounting sleeve is provided with athrough hole D extending through the mounting sleeve in the axialdirection of the flange, and the ejector pin 2032 is slidably disposedin the through hole D. The guiding sleeve is provided with a guidinggroove, and the ejector pin 2032 is slidably disposed in the guidinggroove. A concave portion J is disposed on an end surface of themounting sleeve.

In some embodiments, the quantity of the flange locking structures isone, and the flange locking structure is used for selectively lockingthe two flanges to be adapted to rotate one of the two flangessynchronously with the other of the two flanges. Thus, the lockingdevice 200 is a one-way locking device 200 a.

In some embodiments, the quantity of the flange locking structures istwo, and the flange locking structures are used for selectively lockingthe two flanges. One of the flange locking structures is used forselectively locking the two flanges to be adapted to rotate one of thetwo flanges synchronously with the other of the two flanges. The otherof the flange locking structures is used for selectively locking the twoflanges to be adapted to rotate the other of the two flangessynchronously with one of the two flanges. Thus, the locking device 200is a two-way locking device 200 a.

A power transmission system 10000 according to embodiments of thepresent invention will now be described with reference to FIG. 1. Asshown in FIG. 1, the power transmission system 10000 includes a firstpower assembly 1000, a second power assembly 1000, a first lockingdevice C1 and a second locking device C2.

The first power assembly 1000 is used for driving a front wheel of thevehicle, the second power assembly 1000 is used for driving a rear wheelof the vehicle, and the first power assembly 1000 and the second powerassembly 1000 each include a first power component 100 a and a secondpower component 100 b. The first power component 100 a is used fordriving a wheel on the left side, and the second power component 100 bis used for driving a wheel on the right side. The first power component100 a and the second power component 100 b each include a motor 101 anda transmission 102, and the transmission 102 is adapted to be connectedbetween the motor 101 and the wheel on the corresponding side.

The first power component 100 a and the second power component 100 b ofthe first power assembly 1000 are connected by a first locking structurefor selective synchronization.

The first power component 100 a and the second power component 100 b ofthe second power assembly 1000 are connected by a second lockingstructure for selective synchronization.

The first locking device C1 and the second locking device C2 are both atwo-way locking device 200 b. The two-way locking device 200 b is usedfor selectively synchronizing the first power component 100 a and thesecond power component 100 b such that the first power component 100 amoves synchronously with the second power component 100 b or the secondpower component 100 b moves synchronously with the first power component100 a.

The two-way locking device 200 b includes a first flange 201 a, a secondflange 201 b, a first flange locking structure Q1 and a second flangelocking structure Q2.

The first flange 201 a is fixed on the first shaft X1, and the firstshaft X1 is the transmission shaft of the transmission 102 of the firstpower component 100 a. The second flange 201 b is fixed on the secondshaft X2, and the second shaft X2 is the transmission shaft of thetransmission 102 of the second power component 100 b.

The first flange locking structure Q1 is used for selectively lockingthe first flange 201 a and the second flange 201 b to be adapted torotate the second flange 201 b synchronously with the first flange 201a.

The second flange locking structure Q2 is used for selectively lockingthe second flange 201 b and the first flange 201 a to be adapted torotate the first flange 201 a synchronously with the second flange 201b.

The first flange locking structure Q1 and the second flange lockingstructure Q2 each include a synchronizing ring 202 and a drivingcomponent 203.

The synchronizing ring 202 is normally connected to the correspondingflange to be adapted to rotate synchronously with the correspondingflange, and the synchronizing ring 202 is slidable relative to thecorresponding flange. The driving component 203 selectively pushes thesynchronizing ring 202 to slide from the unlocked position to the lockedposition in the axial direction of the corresponding flange.

When the synchronizing ring 202 is in the locked position, the twosynchronizing rings 202 are connected to be adapted to rotate the otherflange synchronously with the flange corresponding to the synchronizingring 202. When the synchronizing ring 202 is in the unlocked position,the two synchronizing rings 202 are separated.

The driving component 203 includes an electromagnet 2031, an ejector pin2032 and a driving member 2033. The electromagnet 2031 is adapted to befixed on the housing 103. One end of the ejector pin 2032 is slidablyconnected to the corresponding flange. The driving member 2033 isprovided with a driving profile S. The other end of the ejector pin 2032is matched with the driving profile S.

The electromagnet 2031 is selectively energized. When the wheel on thecorresponding side slips, the electromagnet 2031 is energized, thedriving member 2033 is fixed to drive the ejector pin 2032 to move inthe axial direction of the corresponding flange by the driving profileS, and to push the corresponding synchronizing ring 202 to move from aposition where the two synchronizing rings 202 are separated to aposition where the two synchronizing rings 202 are connected.

The first flange locking structure Q1 and the second flange lockingstructure Q2 each further include a stop piece and an elastic returnmember 205. The elastic return member 205 is connected to the stoppiece, and the stop piece is connected to the corresponding flange. Inthe axial direction of the corresponding flange, the elastic returnmember 205 is located between the corresponding synchronizing ring 202and the stop piece. During the movement of the correspondingsynchronizing ring 202 from the unlocked position to the lockedposition, the elastic return member is compressed.

The elastic return member 205 is a wave spring.

The power transmission system 10000 has a single motor front-wheel drivemode. When the power transmission system 10000 is in the single motorfront-wheel drive mode, only one motor 101 of the first power assembly1000 works, and the first locking device C1 synchronizes thecorresponding first power component 100 a and the second power component100 b.

The power transmission system 10000 has a single motor rear-wheel drivemode. When the power transmission system 10000 is in the single motorrear-wheel drive mode, only one motor 101 of the second power assembly1000 works, and the second locking device C2 synchronizes thecorresponding first power component 100 a and the second power component100 b.

The power transmission system 10000 has a first dual motor front-wheeldrive mode. When the power transmission system 10000 is in the firstdual motor front-wheel drive mode, only the two motors 101 of the firstpower assembly 1000 work.

The power transmission system 10000 has a second dual motor front-wheeldrive mode. When the power transmission system 10000 is in the seconddual motor front-wheel drive mode, only the two motors 101 of the firstpower assembly 1000 work, and when the front wheel on one side slips,the first locking device C1 synchronizes the corresponding first powercomponent 100 a and second power component 100 b.

The power transmission system 10000 has a first dual motor rear-wheeldrive mode. When the power transmission system 10000 is in the firstdual motor rear-wheel drive mode, only the two motors 101 of the secondpower assembly 1000 work.

The power transmission system 10000 has a second dual motor rear-wheeldrive mode. When the power transmission system 10000 is in the seconddual motor rear-wheel drive mode, only the two motors 101 of the secondpower assembly 1000 work, and when the rear wheel on one side slips, thesecond locking device C2 synchronizes the corresponding first powercomponent 100 a and second power component 100 b.

The power transmission system 10000 has a dual motor four-wheel drivemode. When the power transmission system 10000 is in the dual motorfour-wheel drive mode, only one of the two motors 101 of the first powerassembly 1000 works, and only one of the two motors 101 of the secondpower assembly 1000 works. The first locking device C1 synchronizes thecorresponding first power component 100 a and the second power component100 b, and the second locking device C2 synchronizes the correspondingfirst power component 100 a and second power component 100 b.

The power transmission system 10000 has a first three-motor four-wheeldrive mode. When the power transmission system 10000 is in the firstthree-motor four-wheel drive mode, only one of the two motors 101 of thefirst power assembly 1000 works, and both the two motors 101 of thesecond power assembly 1000 work. The first locking device C1synchronizes the corresponding first power component 100 a and secondpower component 100 b.

The power transmission system 10000 has a second three-motor four-wheeldrive mode. When the power transmission system 10000 is in the secondthree-motor four-wheel drive mode, only one of the two motors 101 of thesecond power assembly 1000 works, and both of the two motors 101 of thefirst power assembly 1000 work. The second locking device C2synchronizes the corresponding first power component 100 a and secondpower component 100 b.

The power transmission system 10000 has a first four-motor four-wheeldrive mode. When the power transmission system 10000 is in the firstfour-motor four-wheel drive mode, the two motors 101 of the first powerassembly 1000 work, and the two motors 101 of the second power assembly1000 work.

The power transmission system 10000 has a second four-motor four-wheeldrive mode. When the power transmission system 10000 is in the secondfour-motor four-wheel drive mode, the two motors 101 of the first powerassembly 1000 work, and the two motors 101 of the second power assembly1000 work. When the front wheel on one side slips, the first lockingdevice Cl synchronizes the corresponding first power component 100 a andsecond power component 100 b.

The power transmission system 10000 has a third four-motor four-wheeldrive mode. When the power transmission system 10000 is in the thirdfour-motor four-wheel drive mode, the two motors 101 of the first powerassembly 1000 work, and the two motors 101 of the second power assembly1000 work. When the rear wheel on one side slips, the second lockingdevice C2 synchronizes the corresponding first power component 100 a andsecond power component 100 b.

The power transmission system 10000 has a fourth four-motor four-wheeldrive mode. When the power transmission system 10000 is in the fourthfour-motor four-wheel drive mode, the two motors 101 of the first powerassembly 1000 work, and the two motors 101 of the second power assembly1000 work. When the front wheel on one side slips and the rear wheel onone side slips, the first locking device C1 synchronizes thecorresponding first power component 100 a and the second power component100 b, and the second locking device C2 synchronizes the correspondingfirst power component 100 a and second power component 100 b.

According to the power transmission system 10000 of embodiments of thepresent invention, the front and rear power assemblies 1000 are bothelectrically driven, and the front and rear power assemblies 1000 eachadopt a two-way locking device 200 b. The power transmission system10000 has multiple modes, is more suitable for various workingconditions that occur during actual running of the vehicle, and thus,has good power performance and good adaptability.

A vehicle according to some embodiments of the present inventionincludes the power assembly 1000 of the above embodiments.

A vehicle according to some embodiments of the present inventionincludes the power transmission system 10000 of the above embodiments.

A vehicle according to some embodiments of the present inventionincludes the locking device 200 of the above embodiments.

It can be understood that various embodiments of the power assembly1000, the power transmission system 10000 and the locking device 200 ofthe present invention can be used for mutual reference. For example, thesecond flange 201 b in the two-way locking device 200 b of FIG. 25 toFIG. 29 can be applied to the one-way locking device 200 a. For example,the flanges of FIG. 20 to FIG. 24 can be applied to the two-way lockingdevice 200 b, as well as to the one-way locking device 200 a. Forexample, in some of the one-way locking devices 200 a, the second flange201 b in the two-way locking device 200 b of FIG. 25 to FIG. 29 is used,and the structure of the first flange 201 a selectively synchronous withthe second flange 201 b can refer to the structure of the first flange201 a of FIG. 16 to FIG. 19. However, in this embodiment, the firstflange 201 a is not provided with the ejector pin 2032.

Further, in the present invention, the flange may be the first flange201 a, the flange may also be the second flange 201 b, and the twoflanges may include the first flange 201 a and the second flange 201 b.

In the description of the present invention, it should be understoodthat, orientations or position relationships indicated by terms such as“center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”,“up”, “down”, “front”, “back”, “left”, “right”, “vertical”,“horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”,“counterclockwise”, “axial”, “radial”, and “circumferential” areorientations or position relationship shown based on the accompanyingdrawings, and are merely used for describing the present invention andsimplifying the description, rather than indicating or implying that theapparatus or element should have a particular orientation or beconstructed and operated in a particular orientation, and therefore,should not be construed as a limitation on the present invention.

In addition, terms “first” and “second” are used only for descriptionpurposes, and shall not be understood as indicating or suggestingrelative importance or implicitly indicating a quantity of indicatedtechnical features. Therefore, features defined by “first” and “second”may explicitly or implicitly include at least one feature. In thedescription of the present invention, unless otherwise specificallylimited, “multiple” means at least two, for example, two or three.

In the present invention, it should be noted that unless otherwiseclearly specified and limited, the terms “mounted”, “connected”,“connection”, and “fixed” should be understood in a broad sense. Forexample, a connection may be a fixed connection, a detachableconnection, or an integral connection; may be a mechanical connection oran electrical connection, or mutual communication; may be a directconnection or an indirect connection by means of an intermediate medium;or may be internal communication between two elements or interactionrelationship between two elements, unless otherwise clearly limited. Aperson of ordinary skill in the art may understand specific meanings ofthe terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified andlimited, that a first feature is “above” or “below” a second feature maybe that the first and the second features are in contact with each otherdirectly, or the first and the second features are in contact with eachother indirectly by using an intermediate medium. Moreover, that thefirst feature is “above”, “over”, and “on” the second feature may bethat the first feature is right above the second feature or at aninclined top of the second feature, or may merely indicate that thehorizontal height of the first feature is higher than that of the secondfeature. That the first feature is “below”, “under”, and “beneath” thesecond feature may be that the first feature is right below the secondfeature or at an inclined bottom of the second feature, or may merelyindicate that the horizontal height of the first feature is lower thanthat of the second feature.

In the descriptions of this specification, a description of a referenceterm such as “an embodiment”, “some embodiments”, “an example”, “aspecific example”, or “some examples” means that a specific feature,structure, material, or characteristic that is described with referenceto the embodiment or the example is included in at least one embodimentor example of the present invention. In this specification, schematicdescriptions of the foregoing terms do not need to aim at a sameembodiment or example. In addition, the described specific features,structures, materials, or characteristics may be combined in a propermanner in any one or more of the embodiments or examples. In addition, aperson skilled in the art may integrate or combine different embodimentsor examples and characteristics of different embodiments or examplesdescribed in the specification, as long as they do not conflict eachother.

Although the embodiments of the present invention are shown anddescribed above, it can be understood that, the foregoing embodimentsare exemplary, and cannot be construed as a limitation to the presentinvention. Within the scope of the present invention, a person ofordinary skill in the art may make changes, modifications, replacement,and variations to the foregoing embodiments.

What is claimed is:
 1. A locking device, comprising: a first flange, thefirst flange being adapted to be fixed on a first shaft; a secondflange, the second flange being adapted to be fixed on a second shaft; afirst flange locking structure, the first flange locking structure beingconfigured to selectively lock the first flange and the second flange tobe adapted to rotate the second flange synchronously with the firstflange; and a second flange locking structure, the second flange lockingstructure being configured to selectively lock the second flange and thefirst flange to be adapted to rotate the first flange synchronously withthe second flange, wherein the first flange locking structure and thesecond flange locking structure each comprise: a synchronizing ring, thesynchronizing ring being normally connected to the corresponding flangeto be adapted to rotate synchronously with the corresponding flange, andthe synchronizing ring being slidable relative to the correspondingflange; and a driving component, the driving component selectivelypushing the synchronizing ring to slide from an unlocked position to alocked position in an axial direction of the corresponding flange,wherein when the synchronizing ring is in the locked position, the twosynchronizing rings are connected to be adapted to rotate the otherflange synchronously with the flange corresponding to the synchronizingring, and when the synchronizing ring is in the unlocked position, thetwo synchronizing rings are separated.
 2. The locking device accordingto claim 1, wherein the driving component comprises: an electromagnet,the electromagnet being adapted to be fixed on a housing; an ejectorpin, one end of the ejector pin being slidably connected to thecorresponding flange; and a driving member, the driving member having adriving profile, and the other end of the ejector pin being matched withthe driving profile, wherein the electromagnet is selectively energized,and when the electromagnet is energized, the driving member is fixed todrive the ejector pin to move in the axial direction of thecorresponding flange through the driving profile, and to push thecorresponding synchronizing ring to move from a position where the twosynchronizing rings are separated to a position where the twosynchronizing rings are connected.
 3. The locking device according toclaim 2, wherein the ejector pin and the driving profile are bothmultiple and in one-to-one correspondence, and the ejector pins arespaced apart in a circumferential direction of the corresponding flange.4. The locking device according to claim 2, wherein the driving profileis a V-shaped profile, and in the axial direction of the correspondingflange, the opening of the V-shaped profile increases from one end awayfrom the other flange to one end near the other flange.
 5. The lockingdevice according to claim 4, wherein in the axial direction of thecorresponding flange, a side wall of the V-shaped profile extends alonga straight line or an arc from one end away from the other flange to oneend near the other flange.
 6. The locking device according to claim 2,wherein the first flange locking structure and the second flange lockingstructure each further comprise a bushing, the bushing being sleevedover and fixed on the corresponding flange, and in the axial directionof the corresponding flange, the electromagnet being sandwiched betweenthe bushing and the corresponding housing.
 7. The locking deviceaccording to claim 2, wherein the first flange and the second flangeeach comprise: a fixing sleeve, the fixing sleeve being sleeved over andfixed on the corresponding shaft, and both the electromagnet and thedriving member being sleeved over the fixing sleeve; a mounting sleeve,the mounting sleeve having a through hole extending through the mountingsleeve in the axial direction of the corresponding flange, and theejector pin being slidably disposed in the through hole; and a guidingsleeve, the guiding sleeve being provided with a guiding groove, and theejector pin being slidably disposed in the guiding groove.
 8. Thelocking device according to claim 7, wherein in the axial direction ofthe corresponding flange, the fixing sleeve, the mounting sleeve and theguiding sleeve are connected sequentially and the distance to the otherflange is decreased.
 9. The locking device according to claim 7, whereinthe guiding groove of the first flange is disposed on an innercircumferential surface of the guiding sleeve, and the guiding groove ofthe second flange is disposed on an outer circumferential surface of theguiding sleeve.
 10. The locking device according to claim 7, wherein anouter circumferential surface of the synchronizing ring of the firstflange locking structure is provided with an outer ring gear portion,and the inner circumferential surface of the guiding sleeve of the firstflange locking structure is provided with an inner tooth groove matchedwith teeth of the outer ring gear portion; and an inner circumferentialsurface of the synchronizing ring of the second flange locking structureis provided with an inner ring gear portion, and the outercircumferential surface of the guiding sleeve of the second flangelocking structure is provided with an outer tooth groove matched withteeth of the inner ring gear portion.
 11. The locking device accordingto claim 2, wherein an inner circumferential surface of thesynchronizing ring of the first flange locking structure is providedwith an inner ring gear portion, and an outer circumferential surface ofthe synchronizing ring of the second flange locking structure isprovided with an outer tooth groove adapted to be matched with teeth ofthe inner ring gear portion.
 12. The locking device according to claim1, wherein the first flange locking structure and the second flangelocking structure each further comprise: a stop piece and an elasticreturn member, the elastic return member being connected to the stoppiece, the stop piece being connected to the corresponding flange, inthe axial direction of the corresponding flange, the elastic returnmember being located between the corresponding synchronizing ring andthe stop piece, and during the movement of the correspondingsynchronizing ring from the unlocked position to the locked position,the elastic return member is compressed.
 13. The locking deviceaccording to claim 12, wherein the elastic return member is a wavespring.
 14. A power assembly, comprising: a first power component and asecond power component, the first power component being configured todrive a wheel on the left side, the second power component beingconfigured to drive a wheel on the right side, the first power componentand the second power component each comprising a motor and atransmission, and the transmission being adapted to be connected betweenthe motor and the wheel on the corresponding side; and a locking device,comprising: a first flange, the first flange being adapted to be fixedon a first shaft; a second flange, the second flange being adapted to befixed on a second shaft; a first flange locking structure, the firstflange locking structure being configured to selectively lock the firstflange and the second flange to be adapted to rotate the second flangesynchronously with the first flange; and a second flange lockingstructure, the second flange locking structure being configured toselectively lock the second flange and the first flange to be adapted torotate the first flange synchronously with the second flange, whereinthe first flange locking structure and the second flange lockingstructure each comprise: a synchronizing ring, the synchronizing ringbeing normally connected to the corresponding flange to be adapted torotate synchronously with the corresponding flange, and thesynchronizing ring being slidable relative to the corresponding flange;and a driving component, the driving component selectively pushing thesynchronizing ring to slide from an unlocked position to a lockedposition in an axial direction of the corresponding flange, wherein whenthe synchronizing ring is in the locked position, the two synchronizingrings are connected to be adapted to rotate the other flangesynchronously with the flange corresponding to the synchronizing ring,and when the synchronizing ring is in the unlocked position, the twosynchronizing rings are separated; the first power component comprisingthe first shaft, the second power component comprising the second shaft,the first flange being fixed on the first shaft, the second flange beingfixed on the second shaft, the first flange locking structure beingconfigured to selectively synchronize the first shaft and the secondshaft such that the second shaft rotates synchronously with the firstshaft, and the second flange locking structure being configured toselectively synchronize the second shaft and the first shaft such thatthe first shaft rotates synchronously with the second shaft.
 15. Thepower assembly according to claim 14, wherein the transmission is athree-stage reducer, the three-stage reducer comprising: an input shaft,the input shaft being provided with a primary driving gear, and theinput shaft being connected to the motor; a first intermediate shaft,the first intermediate shaft being provided with a primary driven gearand a secondary driving gear, and the primary driven gear meshing withthe primary driving gear; a second intermediate shaft, the secondintermediate shaft being provided with a secondary driven gear and atertiary driving gear, and the secondary driven gear meshing with thesecondary driving gear; and an output shaft, the output shaft beingconnected to the wheel on the corresponding side, the output shaft beingprovided with a tertiary driven gear, and the tertiary driven gearmeshing with the tertiary driving gear, wherein one of the input shaft,the first intermediate shaft, the second intermediate shaft and theoutput shaft of the first power component is the first shaft, and one ofthe input shaft, the first intermediate shaft, the second intermediateshaft and the output shaft of the second power component is the secondshaft.
 16. The power assembly according to claim 15, wherein the lockingdevice is connected between the two second intermediate shafts toselectively synchronize the two second intermediate shafts.
 17. A powertransmission system comprising at least one power assembly, the powerassembly comprising: . a first power component and a second powercomponent, the first power component being configured to drive a wheelon the left side, the second power component being configured to drive awheel on the right side, the first power component and the second powercomponent each comprising a motor and a transmission, and thetransmission being adapted to be connected between the motor and thewheel on the corresponding side; and a locking device, comprising: afirst flange, the first flange being adapted to be fixed on a firstshaft; a second flange, the second flange being adapted to be fixed on asecond shaft; a first flange locking structure, the first flange lockingstructure being configured to selectively lock the first flange and thesecond flange to be adapted to rotate the second flange synchronouslywith the first flange; and a second flange locking structure, the secondflange locking structure being configured to selectively lock the secondflange and the first flange to be adapted to rotate the first flangesynchronously with the second flange, wherein the first flange lockingstructure and the second flange locking structure each comprise: asynchronizing ring, the synchronizing ring being normally connected tothe corresponding flange to be adapted to rotate synchronously with thecorresponding flange, and the synchronizing ring being slidable relativeto the corresponding flange; and a driving component, the drivingcomponent selectively pushing the synchronizing ring to slide from anunlocked position to a locked position in an axial direction of thecorresponding flange, wherein when the synchronizing ring is in thelocked position, the two synchronizing rings are connected to be adaptedto rotate the other flange synchronously with the flange correspondingto the synchronizing ring, and when the synchronizing ring is in theunlocked position, the two synchronizing rings are separated; the firstpower component comprising the first shaft, the second power componentcomprising the second shaft, the first flange being fixed on the firstshaft, the second flange being fixed on the second shaft, the firstflange locking structure being configured to selectively synchronize thefirst shaft and the second shaft such that the second shaft rotatessynchronously with the first shaft, and the second flange lockingstructure being configured to selectively synchronize the second shaftand the first shaft such that the first shaft rotates synchronously withthe second shaft.
 18. The power transmission system according to claim17, wherein the first power component and the second power component ofthe same power assembly each comprise a housing, and the motor and thetransmission disposed in the housing, the two housings are connected anda connecting portion of the two housings defines an accommodatingcavity, and the locking device is disposed in the accommodating cavity.19. The power transmission system according to claim 17, wherein thequantity of the power assemblies is one, and the power assembly isconfigured to drive a front wheel or a rear wheel of a vehicle.
 20. Thepower transmission system according to claim 17, wherein the quantity ofthe power assemblies is two, one of the power assemblies is configuredto drive a front wheel of a vehicle and the other power assembly isconfigured to drive a rear wheel of the vehicle.